Samsung AC MXADKH Series Installation Manual

17EnglishInstallation ProcedureCorrect Inclined DamagedSurface Cracked UnevenThicknessCAUTION• If the pipes require brazing ensure that OFN(OxygenFree Nitrogen) is flowing through the system.• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.Step 7 Connecting up and removing airin the circuitCAUTION• When installing, make sure there is no leakage. Whenrecovering the refrigerant, ground the compressorfirst before removing the connection pipe. If therefrigerant pipe is not properly connected and thecompressor works with the service valve open, thepipe inhales the air and it makes the pressure insideof the refrigerant cycle abnormally high. It may causeexplosion and injury.The air in the indoor unit and in the pipe must beevacuated. If air remains in the refrigerant pipes, it willaffect the compressor either reduce cooling/heatingcapacity or lead to a malfunction. Refrigerant for airpurging is not charged in the outdoor unit. Use VacuumPump as shown at the right figure.1 Connect each assembly pipe to the appropriate valveon the outdoor unit and tighten the flare nut.2 Referring to the illustration below, tighten the flarenut on section D first manually and then with atorque wrench, applying the following torque.Outdoor Unit B(Liquid)A(Gas)DC3 Connect the charging hose of low pressure side ofmanifold gauge to the packed valve having a serviceport as shown at the figure.CAUTION• The designs and shape are subject to changeaccording to the model.4 Open the valve of the low pressure side(A) ofmanifold gauge anticlockwise.A(Gas)B(liquid)VacuumPump